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Date:      Sat, 17 Jun 2006 15:07:55 -0500
From:      Dan Nelson <dnelson@allantgroup.com>
To:        "Marc G. Fournier" <scrappy@hub.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: 6.1:  kern.ipc.maxpipekva
Message-ID:  <20060617200755.GG74191@dan.emsphone.com>
In-Reply-To: <20060617165626.V1114@ganymede.hub.org>
References:  <20060617164334.K1114@ganymede.hub.org> <20060617165626.V1114@ganymede.hub.org>

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In the last episode (Jun 17), Marc G. Fournier said:
> On Sat, 17 Jun 2006, Marc G. Fournier wrote:
> >Jun 17 16:00:03 pluto kernel: kern.ipc.maxpipekva exceeded; see tuning(7)
> >Jun 17 16:00:04 pluto kernel: kern.ipc.maxpipekva exceeded; see tuning(7)
> >
> >but I can't seem to find anything in tuning(7) about it ... so, what
> >is it and how do I monitor for it?
> 
> More on this:
> 
> # sysctl -a | grep pipekva
> kern.ipc.maxpipekva: 16777216
> kern.ipc.pipekva: 15122432
> 
> and I just rebooted the server ...
> 
> so obviously I've been living on the edge ... not sure what to increase it 
> to, since not sure what it affects, so will wait on responses ...

Try also running "sysctl kern.ipc | grep pipe", which will also tell
you how many pipes are in use, plus some other counters.  The comment
at the top of sys/kern/sys_pipe.c explains how pipes are given memory.

-- 
	Dan Nelson
	dnelson@allantgroup.com



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